I have 20 columns in list. With 5 views, each view for different group. When click on particular view & ADD NEW ITEM it shows all column names. Is there any way to hide extra columns?

　

Suggestions:

• You can create 5 different content type each one with request columns.
• You can develop new form

• New form, either with SharePoint Designer of InfoPath will make the trick.
  If no mayor experience with this tool, the easiest way may be the content type approach. Create content types based on which columns you want to display or not. Another option is to hide columns from view in edit form.. to do this you will need to first "Allow management of content types" in the advanced settings of the library settings.
  Then once the content type shows up in the library settings, click on it and you can choose to set the status of each column as "Optional", "required" or "hidden"

• Note:
Sometimes content type method only works when editing a item or in datasheet view or if we click above on the ribbon and click on new item and pick my content type.